Subtract 40/84 from 9/90
9/90 - 40/84 is -79/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
9/90 = 9 × 14/90 × 14 = 126/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
40/84 = 40 × 15/84 × 15 = 600/1260 - Subtract the two like fractions:
126/1260 - 600/1260 = 126 - 600/1260 = -474/1260 - After reducing the fraction, the answer is -79/210
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